It is a good idea to charge more money… It probably saves a little time, although cable routing is probably much more important and difficult.

Couple of “thumbs down” points:

• “Test L” port is above N, and “Test N” is above L, which is unfortunate and confusing.
• Colour coding for PE terminals is sadly green which doesn't comply with BS EN 60445 (or BS 7671, although BS 7671 doesn't apply to the product itself, only its selection).

although cable routing is probably much more important and difficult.

Apparently not… 

   - Andy.

Colour coding for PE terminals is unfortunately green

Perhaps it's just decoration rather than colour coding … after all the terminal is identified by the Earth symbol (as the others are identified by L and N letters).

   - Andy.

They sell it as colour coding … and on the down side it's the colour of part of the terminal.

On the “thumbs up” side, a few people have said to me they struggle with the screw terminals on this particular range, so this might be an improvement for those people.

Not been able to ascertain yet whether they are suitable for flexible conductors, prepared with ferrules or otherwise (would affect the possibility for their use in certain applications, such as mobile & transportable units, and some caravans). 

EDIT - after a quick look at the video above, there is no “sol”, “r” or “f” marking evident, so it would appear they are suitable for all conductor stranding types?

The thing I like the idea of with screwless terminals in general, is that, if the idea is implemented properly, the retaining force on the copper is theoretically maintained as the copper (being soft) slowly distorts over time, whereas with a simple clamping screw the terminal connection naturally comes loose over time.

Whether this is just a fantasy in my mind, only time will tell. Being an engineer you get to thinking there's some issue or another with any solution.

EDIT - after a quick look at the video above, there is no “sol”, “r” or “f” marking evident, so it would appear they are suitable for all conductor stranding types?

If you look at around 4:30 onwards in the video they show Class 1, class 2 and class 5 conductors being connected… 

   - Andy.

I saw these last week, not tried one yet. 

There are a few videos doing the rounds though demonstrating 2.5 being easily pulled out.

Have we gone back to the 70s with earth colouring too? Must get some new green sleeve. 

The Earth colour is not G/Y because that throws up all kinds of moulding difficulties, and means a complex second set of expensive dies and a double (2 shot) moulding machine. It doesn't matter does it and this is not cable insulation so out of scope for BS7671? I am much more concerned that wires are not tightly fixed as I said above.

You need to study creep somewhat Graham, it is not a normal temperature phenomenon in copper, only perhaps if the wire gets very hot (hundreds of degrees), and usually work hardening will limit any small change due to the screw pressure (which is very high hopefully).